Submission #5119

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
5119	2014-02-10 03:56:20	ainta	Cactus? Not cactus? (kriii1_C)	C++98	0 / 1	72 ms	11468 KiB

C

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#include<stdio.h>
#include<algorithm>
#include<vector>
using namespace std;
int par[100010], num[100100], C;
bool chk[100010], ck;
vector<int>E[100010];
int n;
void DFS(int a, int p){
  par[a] = p;
  num[a] = ++C;
  int i, x;
  for (i = 0; i < E[a].size(); i++){
    if (E[a][i] == p)continue;
    if (par[E[a][i]]){
      if (num[E[a][i]] > num[a])continue;
      x = a;
      while (x != E[a][i]){
        ck |= chk[x];
        chk[x] = true;
        x = par[x];
      }
      ck |= chk[x];
      chk[x] = true;
      if (ck)return;
    }
    else DFS(E[a][i], a);
    if (ck)return;
  }
 
 
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• Subtask 1: 0 / 1